Here’s an easy way to save serious cash on your cable bill

So, you know the modem that the cable company gave you for home Internet access? Well, they didn’t really give it to you—they’re renting it to you, and you’re getting charged for it each month.

In fact, you could be spending up to $10 a month to rent your cable modem. Doing the math, that adds up to $120 a year, every year. Ouch.

Rather spend that $120 on something else? All you need to do is return your carrier’s cable modem and buy your own. Cable modems can usually be had for less than $100, and Amazon is having a sale on this $40 Netgear cable modem. The Netgear CM400 is compatible with XFINITY, Time Warner Cable, Cox, Charter and Cablevision—and for 40 bucks, your new cable modem could pay for itself in just four months.